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  1. K

    microsecond power loss durring relay switch over

    so, if I understand correctly it should look something like this? the line in red is there because I am not sure if it is needed. if I just put the cap, wont it block current? shouldn't it have an alternate path (red line) then once current stops the cap discharges. maybe im not...
  2. K

    microsecond power loss durring relay switch over

    That is what I figured. I am not sure though where to position the cap. 12 volt. I also am planning to build a 9V variant. it is a solar to battery switch over.
  3. K

    microsecond power loss durring relay switch over

    I have a relay that switches between 2 power sources. I noticed that there is a microsecond loss of power to the load during the NC - NO switchover going from power source 1 to 2. im scratching my head. how to compensate for that micro second loss. I need continuous power to the load. the...
  4. K

    noob transistor question

    This thing may not be a Raspberry pi then. it is a small mini computer with wifi. I was sort of under the impression it was made from a raspberry pi. anyways it came with a 12V AC adapter and a 12V battery pack however they sell an option to run off of USB. I have run the device using 5 and 12...
  5. K

    noob transistor question

    this is kinda what I had in mind.
  6. K

    noob transistor question

    it can run on a range of 5V to 12V I have run it off of USB power (5v 0.8A) and the battery pack that came with it was 12 volts. I appreciate the help. I haven't messed around with electronics since I was a kid. sorry if my questions are dumb. I learn by doing.
  7. K

    noob transistor question

    hi sorry, I know it doesn't make seance, I am not very familiar with transistors. what I have is a solar cell (5V 1400ma) and a battery pack (12v 1.6A) and a 3V coin battery. the solar cell provides power to a raspberry pi. the relay will be used to kick over to the battery pack when the...
  8. K

    noob transistor question

    Hello, em.. so I have a question about finding the right transistor. I have a 3volt coin battery that operates a 3v relay switch. I need an NPN transistor with a minimum base of 500ma and the collector and emitter to support 3V. can someone suggest a transistor for me? I have a hard time...
  9. K

    very simple transfer switch

    one thing that may make this tricky is that the solar cell and battery pack are at different voltages. the device runs on a range from 5 - 12v and the solar cell is 5v 14a the battery pack is 12V so the battery pack will always win. perhaps a relay may be in order. I need the loss of...
  10. K

    very simple transfer switch

    Hello, I am trying to make a very small simple transfer switch. what I have is a solar cell and a battery pack. I would like to kick over to the battery pack when the solar cell is not producing enough power. I am guessing some sort of transistor will do the trick. can anyone point me...
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